X-Ray-Induced Quenching of the $^{229}\mathrm{Th}$ Clock Isomer in ${\mathrm{CaF}}_{2}$

Author(s): Ming Guan et al. Recent studies have shown that the lifetime of the isomeric $^{229}\mathrm{Th}$ doped in crystals can be shortened by x-ray or laser irradiation, a phenomenon referred to as isomer quenching. We investigate the temperature dependence of x-ray-induced quenching in $^{229}\mathrm{Th}:{\text{CaF}}_{2}$… [Phys. Rev. Lett. 136, 013203] Published Thu Jan 08, 2026